# \#addon

**URL:** https://community.auth0.com/tag/addon/788.md

[Latest](https://community.auth0.com/latest.md) · [Categories](https://community.auth0.com/categories.md) · [Tags](https://community.auth0.com/tags.md)

---

## [Access-Control-Allow-Origin when activate Addon in Client](https://community.auth0.com/t/access-control-allow-origin-when-activate-addon-in-client/9109)

<div class="topic-metadata">

**Author:** [@jacobo.paramo](https://community.auth0.com/u/jacobo.paramo)\
**Replies:** 1\
**Last updated:** [January 2, 2018, 10:38pm UTC](https://community.auth0.com/t/access-control-allow-origin-when-activate-addon-in-client/9109 "2018-01-02T22:38:39Z")

</div>

When I try to acivate SAML2 addon in a Regular Web Application Client, I get this error Failed to load https://contar.au.auth0.com/fingerprint: No ‘Access-Control-Allow-Origin’ header is present on the requested resourc…

---

## [SAML2 Webapp Addon unintended behaviour](https://community.auth0.com/t/saml2-webapp-addon-unintended-behaviour/8360)

<div class="topic-metadata">

**Author:** [@alan.longuet](https://community.auth0.com/u/alan.longuet)\
**Replies:** 5\
**Last updated:** [October 11, 2017, 9:39pm UTC](https://community.auth0.com/t/saml2-webapp-addon-unintended-behaviour/8360 "2017-10-11T21:39:23Z")

</div>

I’m having trouble with the SAML2 Webapp addon since last week. To give you some context, i have two applications, one is embedding the other in an iframe and they both use the same connection. The first application is…